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  <h2 class="title">基本用法</h2>
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   <div class="example" id="example-439">
    <p><strong>Example #1 输出控制举例</strong></p>
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<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br /><br />ob_start</span><span style="color: #007700">();<br />echo&nbsp;</span><span style="color: #DD0000">"Hello\n"</span><span style="color: #007700">;<br /><br /></span><span style="color: #0000BB">setcookie</span><span style="color: #007700">(</span><span style="color: #DD0000">"cookiename"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"cookiedata"</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">ob_end_flush</span><span style="color: #007700">();<br /><br /></span><span style="color: #0000BB">?&gt;</span>
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   在上面的例子中，<span class="function"><a href="function.echo.html" class="function">echo</a></span>函数的输出将一直被保存在输出缓冲区中直到调用
   <span class="function"><a href="function.ob-end-flush.html" class="function">ob_end_flush()</a></span> 。同时，对<span class="function"><a href="function.setcookie.html" class="function">setcookie()</a></span>的调用也成功存储了一个cookie,而不会引起错误。（正常情况下，在数据被发送到浏览器后，就不能再发送http头信息了。）
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